MCM Electronics

InternetSer350 Low Profile Serial MonitorMCM Part #: 28-8870  |  Tripp Lite Part #: INTERNET350SER

No reviews yet!
Login to rate or review this product

  • Protect personal computers, modems and peripherals
  • Six outlets (three UPS/surge, three surge only) protect your entire computer set-up
  • Built-in RJ-11 jacks provide modem/fax protection on up to two lines simultaneously
  • DB-9 communication port and free PowerAlert software (web download) for unattended system shutdown
  • 350 and 550VA models offer a new compact cabinet design

  • 120VAC/60Hz
  • NEMA 5-15R receptacles
  • EMI/RFI filtering = 40dB at 1MHz
  • $25,000 Ultimate Lifetime Insurance covers connected equipment against surge damage for life

  • Product Description


  • Voltage compatibility: 120VAC
  • Frequency compatibility: 60 Hz


  • Output volt amp capacity (VA): 350
  • Output watt capacity (watts): 180
  • Output nominal voltage: 120V
  • Output voltage regulation: LINE MODE: Passes sine wave line voltage from 100-141V to connected equipment unchanged BATTERY MODE: PWM sine wave output 115V +/-5%
  • Output frequency regulation: LINE MODE: Passes line frequency of 60Hz +/-10% BATTERY MODE: Inverter output regulated to 60zHz +/-0.5Hz
  • Outlet quantity / type: 6 NEMA 5-15R


  • Maximum input amps: 12A
  • Input connection type: NEMA 5-15R space saving right-angle plug
  • Input cord length: 6 ft., 16 gauge
  • Recommended electrical service: 15A, 120VAC


  • Full load runtime: 2.5 minutes (350VA)
  • Half load runtime: 10 minutes (175VA)
  • DC system voltage: 12VDC
  • Typical battery lifespan: 3-6 years, depending on usage
  • Battery recharge rate: 2-4 hours to 90%


  • Front panel LEDs: 2 LEDs indicate line power, battery power status
  • Alarms: Audible alarm indicates battery backup operation
  • Switches: Power on/off switch


  • AC surge suppression: 380 joules
  • AC suppression response time: Instantaneous
  • Dataline suppression: Tel/DSL
  • EMI / RFI AC noise suppression: Yes


  • Shipping weight (lbs): 10
  • Shipping weight (kg): 4.54
  • Unit weight (lbs): 7.7
  • Unit weight (kg): 3.5
  • Unit Dimensions (HWD/in): 3 x 10.5 x 5
  • Unit Dimensions (HWD/cm): 7.6 x 26.7 x 12.7
  • Shipping Dimensions (HWD/in): 4.5 x 12.5 x 7.75
  • Shipping Dimensions (HWD/cm): 11.4 x 31.8 x 19.7
  • Material of construction: ABS
  • Form factors supported: Ultra-compact


  • Operating Temperature: +32 to +104 degrees Fahrenheit, 0 to +40 degrees Celsius
  • Storage Temperature: +5 to +122 degrees Fahrenheit, -15 to +50 degrees Celsius
  • Relative Humidity: 0 to 95%, non-condensing


  • Network monitoring port: DB9
  • Software and cabling included: Includes DB9 serial cable, PowerAlert software available via free download from


  • Transfer time from line power to battery mode: 2-4 milliseconds
  • Low voltage transfer to battery power: Switches to battery power as line voltage drops to 99V or lower. Switches back to AC as line voltage increases to 104v or higher
  • High voltage transfer to battery power: Switches to battery power as line voltage increases to 139V or higher. Switches to AC mode as line voltage decreases to 135V or lower


  • Certifications: Tested to UL1778 (USA), Tested to CSA (Canada), Class B (Emissions), NOM (Mexico), FCC Part 68 / Industry Canada (telecommunications)


  • Product warranty: 2 years
  • Connected equipment insurance (USA and Canada Only): $100,000 connected equipment insurance (USA and Canada only)


  • Cold Start: Inverter can be ""cold started"" to enable temporary AC output during a power failure
  • Appearance: Attractive black ultra-compact housing

  • Product Reviews

    • Rate It!
      Be the first to rate this product!

      Login Here to rate and review this product.

    Others Also Bought

    Image of Replacement Blades - 5/pkg

    22-1035 - Replacement Blades - 5/pkg

    A five pack of general use hobby replacement blades for utility knife 22-390.

    In Stock


    Buy Now
    Image of Red/White/Yellow RCA To Rj45 Balun L/R A/V To Cat5

    50-7732 - Red/White/Yellow RCA To Rj45 Balun L/R A/V To Cat5

    L/R Stereo Audio/Video Balun Use to send composite video, plus two channels of unbalanced line level audio over Cat5 cable. This balun features three 8" pigtails with gold plated male RCA connectors, color coded red, white and yellow, and a single female RJ45 jac...

    In Stock


    Buy Now
    Image of Matching Audio Transformer

    555-2855 - Matching Audio Transformer

    Matching Audio Transformer General purpose matching transformer allows proper connection between high and low impedance inputs and outputs. Bi–directional device may be used to balance an unbalanced line, or provide isolation between two pieces of equipment. It m...

    In Stock


    Buy Now
    Package Specifications & Dimensions
    Weight:10.37 lbs.
    Warranty:90 days
    Need to Return?
    Length:13.5 in.
    Width:9.5 in.
    Height:5 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
    Catalog Pages

    MCM Cat 57, Page 850

    MCM Cat 56, Page 760

    Mfr. Info

    Tripp Lite Logo
    Mfr. Name:Tripp Lite
    Mfr. Part Number:INTERNET350SER
    You deserve some post tax day relief
    Save 15% on your order using promo code TXD504